string length

#include < stdio.h >
#include<conio.h>

#include < string.h >

int main()
{
  char a[100];
  int length;
  printf("Enter a string to calculate it's length\n");
  gets(a);

  length = strlen(a);
//strlen(string) : function gives length of string

  printf("Length of entered string is = %d\n",length);

getch();

}